/*
 * Licensed to Crate.io GmbH ("Crate") under one or more contributor
 * license agreements.  See the NOTICE file distributed with this work for
 * additional information regarding copyright ownership.  Crate licenses
 * this file to you under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.  You may
 * obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial agreement.
 */

package io.crate.planner.node.fetch;

import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedHashSet;
import java.util.List;

import io.crate.expression.symbol.InputColumn;
import io.crate.metadata.Reference;

public class FetchSource {

    private final LinkedHashSet<InputColumn> fetchIdCols = new LinkedHashSet<>();
    private final ArrayList<Reference> references = new ArrayList<>();

    public FetchSource() {}

    public void addFetchIdColumn(InputColumn fetchIdColumn) {
        fetchIdCols.add(fetchIdColumn);
    }

    public void addRefToFetch(Reference ref) {
        references.add(ref);
    }

    public Collection<InputColumn> fetchIdCols() {
        return fetchIdCols;
    }

    public List<Reference> references() {
        return references;
    }
}
